1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
/*
* Copyright 2012 Alex Wilson <alex@uq.edu.au>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.traccar.protocol;
import java.util.Calendar;
import java.util.TimeZone;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.traccar.BaseProtocolDecoder;
import org.traccar.model.Position;
/**
* Maxon Datamax GPS send protocol (NMEA + GPFID)
* As seen in the MA100-1010 router
*
* It sends its identity after the GPRMC sentence, and with the type
* GPFID.
*/
public class MaxonProtocolDecoder extends BaseProtocolDecoder {
private Position position = null;
public MaxonProtocolDecoder(MaxonProtocol protocol) {
super(protocol);
}
static private Pattern pattern = Pattern.compile(
"\\$GPRMC," +
"(\\d{2})(\\d{2})(\\d{2})\\.(\\d{2})," + // Time (HHMMSS.SSS)
"([AV])," + // Validity
"(\\d{2})(\\d{2}\\.\\d{5})," + // Latitude (DDMM.MMMMM)
"([NS])," +
"(\\d{3})(\\d{2}\\.\\d{5})," + // Longitude (DDDMM.MMMMM)
"([EW])," +
"(\\d+\\.\\d{3})?," + // Speed
"(\\d+\\.\\d{2})?," + // Course
"(\\d{2})(\\d{2})(\\d{2})" + // Date (DDMMYY)
".+"); // Other (Checksumm)
static private Pattern gpfidPattern = Pattern.compile("\\$GPFID,(\\d+)$");
protected Object decode(
ChannelHandlerContext ctx, Channel channel, Object msg)
throws Exception {
String sentence = (String) msg;
// Detect device ID
// Parse message
if (sentence.contains("$GPRMC")) {
// Parse message
Matcher parser = pattern.matcher(sentence);
if (!parser.matches()) {
return null;
}
// Create new position
position = new Position();
Integer index = 1;
// Time
Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
time.clear();
time.set(Calendar.HOUR_OF_DAY, Integer.valueOf(parser.group(index++)));
time.set(Calendar.MINUTE, Integer.valueOf(parser.group(index++)));
time.set(Calendar.SECOND, Integer.valueOf(parser.group(index++)));
index += 1; // Skip milliseconds
// Validity
position.setValid(parser.group(index++).compareTo("A") == 0);
// Latitude
Double latitude = Double.valueOf(parser.group(index++));
latitude += Double.valueOf(parser.group(index++)) / 60;
if (parser.group(index++).compareTo("S") == 0) latitude = -latitude;
position.setLatitude(latitude);
// Longitude
Double longitude = Double.valueOf(parser.group(index++));
longitude += Double.valueOf(parser.group(index++)) / 60;
if (parser.group(index++).compareTo("W") == 0) longitude = -longitude;
position.setLongitude(longitude);
// Speed
String speed = parser.group(index++);
if (speed != null) {
position.setSpeed(Double.valueOf(speed));
}
// Course
String course = parser.group(index++);
if (course != null) {
position.setCourse(Double.valueOf(course));
}
// Date
time.set(Calendar.DAY_OF_MONTH, Integer.valueOf(parser.group(index++)));
time.set(Calendar.MONTH, Integer.valueOf(parser.group(index++)) - 1);
time.set(Calendar.YEAR, 2000 + Integer.valueOf(parser.group(index++)));
position.setTime(time.getTime());
} else if (sentence.contains("$GPFID") && position != null) {
Matcher parser = gpfidPattern.matcher(sentence);
if (parser.matches()) {
if (!identify(parser.group(1), channel)) {
return null;
}
position.setDeviceId(getDeviceId());
return position;
}
}
return null;
}
}
|
